Improved wood pavement



what??? Je. y, uw; WM z N-PETERS, PHDTD-LITNOGRAPNER, WASHINGTON D CALBERT BETTELEY, OF BOSTON, MASSACHUSETTS.

Letters Patent No. 96,870, dated November 16, 1869.y

IMPROVED WOOD PAVEMENT.

The Schedule referred to in these Letters Patent and making par: of thesame.

To all whom it may concern:

Be it known that I, ALBERT BETTELEY, of Boston, in the county of Suolk,and State of Massachusetts, have invented certain new and usefulImprovements in \Vooden Pavements; and I do hereby declare that-thefollowing, taken in connection with the drawings which accompany' andform part of this specification, is a description oi' my invention,suiiicient to enable those skilled in the art to practise it..

Pavements of wood are usually composed of prismatic blocks. having theend of the grain or fibre ot' the wood presented to the road-bed and tothe travel on4 the paven'lent. Such blocks are usually' cut from largeand consequently valuable ltimber, this adding materially to the cost ofthe pavement.

. My improved pavement is made up of cylinders-or cylindroids ot' wood,of small diameters, such as can be formed from young trees or saplings,of, say, from about four to seven inches diameter, of which a greatquantity can be culled out 'from trees ot' larger growth, to thepositive benetit of thc latter. Savin trees and cedars may also beutilized in my pavement, as being commonly trees of small growth, whichare to he found in great abundance, and are very durable, as being lessliable to decay than pine, spruce, and hemlock,or other woods of whichwooden pavements are com monly made.

Butmy invention does not consist, broadly, in a paveinent made of blocksin the form of wooden cylinders placed with the grain or fibre in avertical direct-ion, as such paven'lents have before been made'.

My invention consists in a pavement made up oi wooden cylinders orcylindroids, cut with their ends parallel and inclined in the samedirection to the axis of the cylinders, so'that theI grain ofthe woodshall be inclined to the road-bed and to the travel on the pavement, andin scoring vthe cylindroids, or the blocks described, preferably on butone side ofeach block,` though they maybe scored on opposite sides, sothat when the rows of blocks are alternately inclined in oppositedirections, the blocks of one row interlock with the blocks ofthe rowsadjoining on either side, and thusone block supports its neighbors, andis prevented from vertical displacement, and also prevents verticaldisplacement of the adjoining iuterlocked blocks.

Figure l, of the drawings, shows in side elevation two rows of blocks ina pavement embodyingr my invention, the row nearest the eye being shownin full lines, and the row bevond, in the rear, partly in dotted lines;w

Figure 2, shows an end view of' four rows oi' a pavement embodying myinvention; and

Figure 3 shows in plan a portion of my improved pavement.

Figs. 2 and -showing the blocks as interloclied by reason of'beingscored on one side.

It will be obvious that within certain limits, the deeper the scoring,Yon the. side or the sides of each block, the closer the rows of blockswill be brought togetherin one direction, and thc smaller will be theinterstices left between them, and zthe `,'reatcr will be the area ofact-ual wood in the pavement, and thel smaller will be the amount ot'cement or sand or gravelfillingl between the pavement-blocks.

lhe acute-angular edge of the upper end of' each block may be removed,it' desired, to afi'ord additional holding-scores or depressions for thefeet of horses.

I claim a wood pavement, composed of cylinders or cylindroids, theadjacent rows of which are scored on one or both sides, and areinterlocked and inclined in opposite directions.

A LBERT BETTELEY.

Witnesses J. B. CROSBY,- FnANols GoULD.

